Caster



omrso smrasrars NT OFFICE.

ALLAN RAMSEY, 0F CHICAGO, ILLINOIS.

CASTER.

Specification of Letters Patent.

Application filed October 11, 1920. Serial No. 416,207.

To all whom it may concern:

Be it known that I, ALLAN RAMSEY, a

citizen of the United States of America,-

and a resident of Chicago, county of Cook, State of Illinois, have invented certain new and useful Improvements in Casters, of which the following is a specification.

This invention relates to bearings, casters or shoes adapted for attachment to house hold furniture of various kinds such as chairs, tables, pianos, clocks and other de-- vices intended to be set rigidly on the floor, shelf or other support. More specifically it pertains to that class of caster-like goods which includes certain attachments known to the trade as domes of silence, used to prevent wear and noise and to facilitate moving the article from place to place.

The main objects of this invention are to provide an attachment such as referred to adapted for ready application to the furniture, and capable of quick adjustment to attain the necessary elevation ofthe foot or other part of the object to be supported in order to secure a stable setting thereof and insure against wabbling; to provide such a device of ornamental character adapted for convenient manual setting at any intermediate stage of its range of adjustment and without the use of any tools; and to provide simple and inexpensive means adapted to prevent accidental change of adjustment of the device.

An illustrative embodiment of this inven tion is shown in the accompanying drawings in which- Figure 1 is a front elevation of a stool having adjustable sliding casters secured to its legs.

Fig. 2 is an enlarged view of one of the attachments and the adjacent part of the corresponding furniture leg.

Fig. 3 is a section on the line 33 of Fig. 2.

In the construction shown in the drawings the stool leg 1 is provided with slidthe outer member or the floor. Said members 4 and 5 are each cup-shaped, the inner member being inverted. cans 6 are provided for maintaining the ad ustment of said parts 4 and 5 relative to each other, said means being in the form of a compression spring of helical shape disposed co-axially with said members 4 and 5. The screw 3 fits in a central perforation 7 in the member 4 and the head of the screw bears against the inner face of the bottom of said member 4.

The caster may be attached to the furniture as follows: The device 2 is first taken apart and then the inner member 4 is se-' cured in place by the fastening screw 8. The shoe member proper 5 is then applied with the spring 6 in place and screwed upon themember 4 as shown in Fig. 3. The elevation of the object 1 is adjusted by screwing the part 5 either forwardly or backwardly, as will be understood. The spring 6 by reason of its pressure serves to prevent any movement or vibration of the furniture from turning the shoe cup 5 or loosening the same in any appreciable degree. Hence said member 5 is substantially fixed except when it is forcibly turned in assembling or adjusting the device. The member 5 is formed to facilitate gripping with the hands, and for this purpose is roughened, corrugated, knurled or grooved as shown at 8 on F1g. 2. The only tool necessary for attaching the member 4 to the furniture, is a screw-driver, and no tool is required for adjusting the member 5.

The members 4 and 5 are preferably made of metal. They may be formed by casting or they may be forged or pressed. Screw threads are then formed thereon as shown at 9 and 10. The bottom or bearing face 11 of the shoe proper 5 is convex-shaped or the edges at least are rounded and smooth to facilitate sliding on the floor. Said face 11 may to advantage be highly polished.

Although but one specific embodiment of this invention is herein shown and described, it is to be understood that some of the details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claims.

I claim:

1. An adjustable caster of extensible character comprising a pair of members disposed in telescopic relation to each other and hav- Patented Feb. 8, 1921..

shoe proper 5 rests on' vent accidental relative turning thereof.

2. An adjustable caster comprising a pair of mutually inverted cup-shaped members adapted to fit adjustably one Within the other, the bottom of one cup being axially perforated and provided with a screw for engaging the object to be supported, said 10 it screw being disposed With its head against the inner side of said one cup and with its threaded shank PIOJBCtIHg upwardto engage said object.

Signed at Chicago this 8th day of 15 t0bei3'1920.

ALLAN RAMSEY. 

